...begun wondering whether there are any x86 registers that can be reserved for library use...

...you have a 80x87 FPU which has registers also)

Optimizing programs which have yet to...

...no intrinsic restriction on the width of registers. But there are just not many uses...

...a trade-off between extremely huge hardware registers & other cpu optimizations like parallelism. Still current...

...I began programming with 8 bit data registers. That was limiting. Almost all useful numbers...

...really helping me. On another platform the registers might not have 32-bits but now...

...come on. The reason for 64-bit registers is purely practical: computer programs need more...

...particular MCU since it has 32-bit registers ~ came in handy for real-time audio...

...anything to say about access to FPU registers.
setting?

gcc puts 2 bytes of pad...

...in
module DMD.EXE at 0167:00404fb9.
Registers:
EAX=0073260c CS=0167 EIP=00404fb9 EFLGS...